What did James K. Polk fear as president?

As president, James K. Polk feared the possibility of a divided nation over the issue of slavery, particularly as the United States expanded westward. He was concerned that the admission of new states could upset the balance between slave and free states, leading to conflict. Additionally, Polk aimed to fulfill his expansionist agenda, which included acquiring territories like Texas and Oregon, and he feared that failing to do so would damage his legacy and the nation's growth.